• 제목/요약/키워드: C-integrals

검색결과 78건 처리시간 0.027초

분자계의 Overlap Integral의 계산의 Spherical Harmonics 전개방법의 응용 (Application of the Expansion Method for Spherical Harmonics for Computation of Overlap Integrals in Molecular System)

  • 안상운
    • 대한화학회지
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    • 제22권3호
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    • pp.117-127
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    • 1978
  • 두점 A와 B에 위치한 Slater원자궤도함수의 spherical harmonics부와 지름부를 기준점 A를 중심으로 전개하여 공통좌표상에 기술하였다. 이 Slater 원자궤도함수의 전개식을 사용하여 two center overlap integral의 기본식을 유도하였으며 이 기본식을 이용하여 $CH_4,\;H_2O,\;NH_3,\;C_2H_6$$PH_3$ 분자의 two center overlap integral을 계산하였을 때 이 값이 Mulliken의 값과 일치하였다.

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탄성-소성-크리프 상태에서 SE(B) 시편의 천이크리프 C(t)-적분 평가 (Estimation of Transient Creep C(t)-integrals for SE(B) Specimen Under Elastic-Plastic-Creep Conditions)

  • 이한상;제진호;김동준;김윤재
    • 대한기계학회논문집A
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    • 제39권9호
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    • pp.851-857
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    • 2015
  • 본 논문에서는 탄성-소성-2 차 크리프 상태에서 시간의존적 C(t) 적분에 대해 평가하였다. Single- Edge-notched-Bend (SEB) 시편에 대해 유한요소 크리프 해석을 수행하였다. 천이 크리프에 대한 초기 소성의 영향을 연구하기 위해 다양한 초기 하중에 대해 고려하였다. 또한, 소성물성과 크리프 물성의 영향을 보기 위해 소성 경화 지수(m)과 크리프 지수(n)이 같은 경우와 다른 경우를 모두 고려하였다. 본 논문에서는 기존 식의 수정을 통해서 천이 크리프 상태에서의 C(t) 적분의 새로운 예측 식을 제시하였다. 유한요소해석 결과와 비교를 통해서 제시된 수식의 타당성을 검증하였고, 소성 경화 지수(m)과 크리프 지수(n)이 같은 경우에만 적용할 수 있는 기존 예측 식을 보완하여 m 과 n 이 다른 경우에도 천이 크리프 상태에서 C(t) 적분을 예측할 수 있는 식을 제시하였다.

A sequential approach to conditional wiener integrals

  • Chang, Seung-Jun;Kang, Si-Ho
    • 대한수학회보
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    • 제29권2호
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    • pp.301-314
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    • 1992
  • In this paper, motivated by [1] and [7] we give a sequential definition of conditional Wiener integral and then use this definition to evaluate conditional Wiener integral of several functions on C [0, T]. The sequential definition is defined as the limit of a sequence of finite dimensional Lebesgue integrals. Thus the evaluation of conditional Wiener integrals involves no integrals in function space [cf, 5].

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c-hexane을 포함하는 이성분계 혼합물에서 활동도계수 모델을 이용한 변동적분 Gij의 계산 수치와 실험 수치의 비교 (Comparison of Experimental Data on the Fluctuation Integral Gij with the Calculated Results Based on the Activity Coefficient Model in Binary Mixtures Containing c-Hexane)

  • 허광일;권영중
    • 산업기술연구
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    • 제20권A호
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    • pp.203-209
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    • 2000
  • The fluctuation integrals which give useful information in the structure of solution are associated with the mixed direct correlation integral ($C_{12}$) known. Using its weighted arithmetic mean of $C_{11}$ and $C_{22}$ and the activity coefficient model, the fluctuation integrals on solute-solute, solvent-solute, and solvent-solvent can be calculated in the function of mole fraction. In this work, several binary mixtures containing c-hexane were tested and the results on the fluctuation integrals were rather good.

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ON A NEW CLASS OF INTEGRALS INVOLVING GENERALIZED HYPERGEOMETRIC FUNCTION 3F2

  • Kim, Insuk;Shantha Kumari., K.;Vyas, Yashoverdhan
    • 호남수학학술지
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    • 제40권1호
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    • pp.61-73
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    • 2018
  • The main aim of this research paper is to evaluate the general integral of the form $${\int_{0}^{1}}x^{c-1}(1-x)^{c+{\ell}}[1+{\alpha}x+{\beta}(1-x)]^{-2c-{\ell}-1}\atop {\times}_3F_2\left\[ {a,\;b,\;2c+{\ell}+1} \\ {\frac{1}{2}(a+b+i+1),\;2c+j\;;\frac{(1+{\alpha})x}{1+{\alpha}x+{\beta}(1-x)} }\right]dx$$ in the most general form for any ${\ell}{\in}\mathbb{Z}$; and $i, j=0,{\pm}1,{\pm}2$. The results are established with the help of generalized Watson's summation theorem due to Lavoie, et al. Fifty interesting general integrals have also been obtained as special cases of our main findings.

ON A NEW CLASS OF DOUBLE INTEGRALS INVOLVING GENERALIZED HYPERGEOMETRIC FUNCTION 3F2

  • Kim, Insuk
    • 호남수학학술지
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    • 제40권4호
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    • pp.809-816
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    • 2018
  • The aim of this research paper is to evaluate fifty double integrals invoving generalized hypergeometric function (25 each) in the form of $${{\int}^1_0}{{\int}^1_0}\;x^{{\gamma}-1}y^{{\gamma}+c-1}(1-x)^{c-1}(1-y)^{c+{\ell}}(1-xy)^{{\delta}-2c-{\ell}-1}{\times}_3F_2\[{^{a,\;b,\;2c+{\ell}+1}_{\frac{1}{2}(a+b+i+1),\;2c+j}}\;;{\frac{(1-x)y}{1-xy}}\]dxdy$$ and $${{\int}^1_0}{{\int}^1_0}\;x^{{\gamma}-1}y^{{\gamma}+c+{\ell}}(1-x)^{c+{\ell}}(1-y)^{c-1}(1-xy)^{{\delta}-2c-{\ell}-1}{\times}_3F_2\[{^{a,\;b,\;2c+{\ell}+1}_{\frac{1}{2}(a+b+i+1),\;2c+j}}\;;{\frac{1-y}{1-xy}}\]dxdy$$ in the most general form for any ${\ell}{\in}{\mathbb{Z}}$ and i, j = 0, ${\pm}1$, ${\pm}2$. The results are derived with the help of generalization of Edwards's well known double integral due to Kim, et al. and generalized classical Watson's summation theorem obtained earlier by Lavoie, et al. More than one hundred ineteresting special cases have also been obtained.

MAPPING PROPERTIES OF THE MARCINKIEWICZ INTEGRALS ON HOMOGENEOUS GROUPS

  • Choi, Young-Woo;Rim, Kyung-Soo
    • 대한수학회지
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    • 제39권1호
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    • pp.61-75
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    • 2002
  • Under the cancellation property and the Lipschitz condition on kernels, we prove that the Marcinkiewicz integrals defined on a homogeneous group H are bounded from $H^1$(H) to $L^1$(H), from $L_{c}$ $^{\infty}$(H) to BMO (H), and from $L^{p}$ (H) to $L^{p}$ (H) for 1 < p < $\infty$ assuming the $L^{q}$ -boundedness for some q > 1.for some q > 1.

EVALUATION OF A NEW CLASS OF DOUBLE DEFINITE INTEGRALS

  • Gaboury, Sebastien;Rathie, Arjun Kumar
    • 대한수학회논문집
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    • 제32권4호
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    • pp.979-990
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    • 2017
  • Inspired by the results obtained by Brychkov ([2]), the authors evaluate a large number of new and interesting double definite integrals. The results are obtained with the use of classical hypergeometric summation theorems and a well-known double finite integral due to Edwards ([3]). The results are given in terms of Psi and Hurwitz zeta functions suitable for numerical computations.

CHANGE OF SCALE FORMULAS FOR WIENER INTEGRAL OVER PATHS IN ABSTRACT WIENER SPACE

  • Kim, Byoung-Soo;Kim, Tae-Soo
    • 대한수학회논문집
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    • 제21권1호
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    • pp.75-88
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    • 2006
  • Wiener measure and Wiener measurability behave badly under the change of scale transformation. We express the analytic Feynman integral over $C_0(B)$ as a limit of Wiener integrals over $C_0(B)$ and establish change of scale formulas for Wiener integrals over $C_0(B)$ for some functionals.